73F103AF-RC Equivalent & Substitute Parts

Part Overview

The 73F103AF-RC is a 1 mH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 150 mA maximum current with 7.5Ohm DC resistance. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 105°C and is ROHS3 compliant.

Substiute Parts

73F103AF-RC

Bourns Inc.In Stock: 112173F103AF-RC Datasheet

Current PartRFQ

B82144A2105J000

EPCOS - TDK ElectronicsIn Stock: 58344B82144A2105J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 73F103AF-RC is determined by the following critical parameters:

• Inductance Value: Must be 1 mH ±5% tolerance
• Core Material & Type: Ferrite drum core, unshielded construction
• Mounting Configuration: Through hole axial package
• Current Handling: Minimum 150 mA rating required
• DC Resistance: Lower DCR values are acceptable as they indicate improved efficiency
• Temperature Range: Must support minimum -55°C to 105°C operation
• Compliance: ROHS3 compliance required

The B82144A2105J000 from EPCOS - TDK Electronics meets these substitution criteria with equivalent inductance, core type, and mounting configuration, while offering improved current rating (200 mA) and lower DC resistance (3.8Ohm).

Parameter Comparison

Engineering Selection Recommendations

The B82144A2105J000 is qualified as a direct substitute for the obsolete 73F103AF-RC based on the following factors:

• Both components maintain identical 1 mH inductance with ±5% tolerance
• Ferrite drum core construction and unshielded configuration are matched
• Through hole axial mounting is preserved, ensuring PCB compatibility
• The substitute provides superior electrical performance with 200 mA current rating versus 150 mA, and reduced DC resistance of 3.8Ohm versus 7.5Ohm
• Extended operating temperature range (-55°C to 125°C) provides additional thermal margin
• Both components are ROHS3 compliant, meeting regulatory requirements
• The substitute is in active production status with substantial inventory availability (58,287 pcs), ensuring supply continuity

Frequently Asked Questions (FAQ)

Q: Can the B82144A2105J000 be used as a direct replacement for the 73F103AF-RC?

A: Yes. Both inductors share identical inductance values (1 mH ±5%), core material (ferrite), shielding configuration (unshielded), and through hole axial mounting. The substitute meets or exceeds all critical electrical parameters of the original part.

Q: What are the advantages of using the B82144A2105J000 substitute?

A: The substitute offers improved current handling capacity (200 mA versus 150 mA) and significantly lower DC resistance (3.8Ohm versus 7.5Ohm), resulting in reduced power dissipation. The extended temperature range (-55°C to 125°C) provides additional operational margin. Active production status ensures reliable supply availability.

Q: Are there any dimensional differences between these parts?

A: Yes. The B82144A2105J000 has smaller physical dimensions (0.205" Dia x 0.472" L) compared to the 73F103AF-RC (0.470" Dia x 0.625" L). PCB layout verification is required to confirm fit within the available space.

Q: Do both parts meet the same compliance standards?

A: Both components are ROHS3 compliant. The substitute is REACH Affected, while the original is REACH Unaffected. Compliance requirements for your specific application should be verified.

Q: What is the inductance test frequency for each part?

A: The 73F103AF-RC is tested at 790 kHz, while the B82144A2105J000 is tested at 100 kHz. Both maintain the specified 1 mH inductance within their respective test conditions.